Halloween trick or treat with pumpkins wearing medical face mask background with silhouettes of castle, witch, dead tree and big moon. corona virus or COVID-19. Halloween 2020. vector illustration Shutterstock .eps vector - Halloween trick or treat with pumpkins wearing medical face mask background with silhouettes of castle, witch, dead tree and big moon. corona virus or COVID-19. Halloween 2020. vector illustration - ID: 1809531085